What safety measure is recommended to reduce large amounts of static electricity when filling above ground flammable storage tanks?

The recommended safety measure to reduce large amounts of static electricity when filling above ground flammable storage tanks is the implementation of grounding wires. Grounding wires provide a conductive path that allows any static charge to be safely dissipated into the ground, preventing the buildup of static electricity that could ignite flammable vapors. This is particularly important during the filling process, as the movement of liquid can generate static electricity, which poses a significant risk of fire or explosion.

While other methods, such as static electricity shields or electron flow detection systems, can play roles in static electricity management, they do not directly address the fundamental need to safely divert static charges as effectively as grounding does. Proper grounding is a critical component in the safe operation of systems that deal with flammable materials, ensuring that static discharges do not create hazardous conditions.